Public Workshop on Advanced Clean Cars II (ACC II)

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Public Workshop on Advanced Clean Cars II

The California Air Resources Board (CARB or the Board) invites you to participate in a public workshop on Wednesday, September 16, 2020, to provide input on CARB’s development of the Advanced Clean Cars II (ACC II) regulations, which will seek to reduce criteria and greenhouse gas emissions from new light- and medium-duty vehicles beyond the 2025 model year, and increase the number of zero emission vehicles (ZEV) for sale. Building on the May 2020 Board Presentation, staff will present current analysis and regulation concepts for modifications to the criteria pollutant and greenhouse gas (Low Emission Vehicle or LEV IV) regulations, preliminary proposals to support wider scale adoption of new ZEVs, and the preliminary staff projections of costs for future battery electric vehicles (BEV) technologies. Staff will request stakeholder comments following the workshop to be submitted to through October 16, 2020.

Staff’s presentation and an agenda will be posted prior to the workshop on CARB’s Advanced Clean Cars website.

This public meeting will be conducted via GoToWebinar. Please register as an attendee prior to the start of the workshop using the link provided. After registering, you will receive a confirmation email with information about joining the webinar.

DATE:                September 16, 2020
TIME:                 9:00 a.m. – 12:30 p.m.
LOCATION:       GoToWebinar



In 2012, CARB adopted a set of regulations to control emissions from passenger vehicles, collectively called Advanced Clean Cars (ACC). Advanced Clean Cars, developed in coordination with the United States (U.S.) Environmental Protection Agency (EPA), combined the control of smog-causing (criteria) pollutants and greenhouse gas (GHG) emissions into a single coordinated package of regulations through 2025 model year vehicles: the Low-Emission Vehicle III regulation for criteria (LEV III Criteria) and GHG (LEV III GHG) emissions, and a technology forcing mandate for zero-emission vehicles (ZEV).

A California midterm review of the standards was presented to the Board in March 2017, and the Board approved staff’s recommendation that the standards were appropriate as adopted through the 2025 model year. At the time, the Board also directed staff to begin working on post-2025 model year vehicle regulations.

Since the midterm review, staff have continued to research additional measures to reduce air pollution from light-duty and medium-duty vehicles to contribute towards achieving federal air quality standards and the State’s carbon neutrality requirements. Staff developed vehicle test programs to evaluate existing technologies and collected real-world data from on-road vehicles to investigate potential areas to improve the current regulations and to identify measures that will better ensure real-world emission benefits. The test programs and the gathered data have allowed staff to begin the process of developing new regulations for post-2025 model year light- and medium-duty vehicles that will strengthen the current standards.


If you have any questions regarding the workshop, please contact If you wish to receive information regarding the Advanced Clean Cars II regulations please subscribe at the Advanced Clean Cars website.